TM 10-3950-672-24-2
Tighten the adjusting screw for the exhaust valve two
complete turns of the screw.
Caution: Use extreme care that the piston does not
push against the exhaust valve with so much force
that it bends the push rod.
Rotate the crankshaft slowly in the direction of engine
rotation until the piston touches the exhaust valve.
Mark the crankshaft pulley.
Caution: Make sure that the piston touches the
valve with approximately the same amount of force
as in the previous step.
Rotate the crankshaft in the opposite direction until the
piston touches the valve.
Mark the crankshaft pulley.
Measure the distance and mark the pulley at one-half
the distance between the two marks. This mark is the
TDC mark.
5-213